
/**
 * jQuery.timers - Timer abstractions for jQuery
 * Written by Blair Mitchelmore (blair DOT mitchelmore AT gmail DOT com)
 * Licensed under the WTFPL (http://sam.zoy.org/wtfpl/).
 * Date: 2009/02/08
 *
 * @author Blair Mitchelmore
 * @version 1.1.2
 *
 **/

jQuery.fn.extend({
    everyTime: function(interval, label, fn, times, belay) {
     return this.each(function() {
      jQuery.timer.add(this, interval, label, fn, times, belay);
     });
    },
    oneTime: function(interval, label, fn) {
     return this.each(function() {
      jQuery.timer.add(this, interval, label, fn, 1);
     });
    },
    stopTime: function(label, fn) {
     return this.each(function() {
      jQuery.timer.remove(this, label, fn);
     });
    }
   });
   
   jQuery.event.special
   
   jQuery.extend({
    timer: {
     global: [],
     guid: 1,
     dataKey: "jQuery.timer",
     regex: /^([0-9]+(?:\.[0-9]*)?)\s*(.*s)?$/,
     powers: {
      // Yeah this is major overkill...
      'ms': 1,
      'cs': 10,
      'ds': 100,
      's': 1000,
      'das': 10000,
      'hs': 100000,
      'ks': 1000000
     },
     timeParse: function(value) {
      if (value == undefined || value == null)
       return null;
      var result = this.regex.exec(jQuery.trim(value.toString()));
      if (result[2]) {
       var num = parseFloat(result[1]);
       var mult = this.powers[result[2]] || 1;
       return num * mult;
      } else {
       return value;
      }
     },
     add: function(element, interval, label, fn, times, belay) {
      var counter = 0;
      
      if (jQuery.isFunction(label)) {
       if (!times) 
        times = fn;
       fn = label;
       label = interval;
      }
      
      interval = jQuery.timer.timeParse(interval);
   
      if (typeof interval != 'number' || isNaN(interval) || interval <= 0)
       return;
   
      if (times && times.constructor != Number) {
       belay = !!times;
       times = 0;
      }
      
      times = times || 0;
      belay = belay || false;
      
      var timers = jQuery.data(element, this.dataKey) || jQuery.data(element, this.dataKey, {});
      
      if (!timers[label])
       timers[label] = {};
      
      fn.timerID = fn.timerID || this.guid++;
      
      var handler = function() {
       if (belay && this.inProgress) 
        return;
       this.inProgress = true;
       if ((++counter > times && times !== 0) || fn.call(element, counter) === false)
        jQuery.timer.remove(element, label, fn);
       this.inProgress = false;
      };
      
      handler.timerID = fn.timerID;
      
      if (!timers[label][fn.timerID])
       timers[label][fn.timerID] = window.setInterval(handler,interval);
      
      this.global.push( element );
      
     },
     remove: function(element, label, fn) {
      var timers = jQuery.data(element, this.dataKey), ret;
      
      if ( timers ) {
       
       if (!label) {
        for ( label in timers )
         this.remove(element, label, fn);
       } else if ( timers[label] ) {
        if ( fn ) {
         if ( fn.timerID ) {
          window.clearInterval(timers[label][fn.timerID]);
          delete timers[label][fn.timerID];
         }
        } else {
         for ( var fn in timers[label] ) {
          window.clearInterval(timers[label][fn]);
          delete timers[label][fn];
         }
        }
        
        for ( ret in timers[label] ) break;
        if ( !ret ) {
         ret = null;
         delete timers[label];
        }
       }
       
       for ( ret in timers ) break;
       if ( !ret ) 
        jQuery.removeData(element, this.dataKey);
      }
     }
    }
   });
   
   jQuery(window).bind("unload", function() {
    jQuery.each(jQuery.timer.global, function(index, item) {
     jQuery.timer.remove(item);
    });
   });